Lets look it up in the dictionary.
For my purposes in the game we would be using definition number 2.
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Main Entry: sa·dism
Pronunciation: 'sA-"di-z&m, 'sa-
Function: noun
Etymology: International Scientific Vocabulary, from Marquis de Sade
Date: 1888
1 : a sexual perversion in which gratification is obtained by the
infliction of physical or mental pain on others (as on a love object); compare MASOCHISM 2 a : delight in cruelty b : excessive cruelty
- sa·dist /'sA-dist, 'sa-/ noun- sa·dis·tic /s&-'dis-tik also sA- or sa-/ adjective
- sa·dis·ti·cal·ly /-ti-k(&-)lE/ adverb